#include <cstdio>
using namespace std;

int n;

void pre() {
	for (int i = 2; i <= n; ++i) {
		
	}
}
void dfs(int x) {

}
int main() {
	freopen("transfer.in","r",stdin);
	freopen("transfer.out","w",stdout);
	scanf("%d",&n);
	
	fclose(stdin);
	fclose(stdout);
	return 0;
}